This happens with every console release, no matter what the supply or the demand was. PlayStation 2's eBay charade kept the 3 going, and more of this is shown with the slim's availability. Hell, even walking out of the WalMart at midnight I got offered 500 bucks for my Wii.

Any major electronic release where the false delusion that demand is limited is going to sweep up huge profit for reselling. iPhones, consoles, elmos, etc